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प्रश्न
What is the cell theory? Who propounded it and when?
उत्तर
All animals and plants are composed of cells, which serve as the units of structure and function. This, in short, is called the Cell Theory,
Cell theory was propounded by Theodor Schwann and Matthias Schleiden in the year 1839 and was modified by Rudolf Virchow in 1858.
APPEARS IN
संबंधित प्रश्न
Write short notes on the following.
Cytoplasm
Where are chromosomes found in a cell? State their function.
Name the part of the cell concerned with the following :
The entry of only certain substances into and out of the cell.
What was the contribution of the following to our knowledge of cells?
Robert Hooke
What is the function of the following?
Cell membrane
Expand - RER
Fill in the blank with a suitable word:
DNA is an abbreviated form of ______.
Fill in the blank with a suitable word:
______ controls all the metabolic activities of the cell.
Match the items in column A with the appropriate items in column B:
| column A | column B |
| 1. Platform or workplace for the synthesis of proteins | a. Golgi complex |
| 2. A powerhouse of cells | b. Ribosomes |
| 3. Help in the formation of cell plate during cell division | c. Chloroplast |
| 4. Site for photosynthesis | d. Mitochondria |
| 5. Control tower of cell | e. Chromosomes |
| 6. A structure bearing genes | f. Nucleus |
What is a 'cell'?
